Central Pneumatic 67698 User manual

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Email our technical support at: [email protected] ITEM 67698
WARNING
To prevent serious injury and
death from improper installation:
ONLY a qualified engineer with
appropriate certifications may attempt
designing a new compressor to ensure
that all required safety and control
elements are in place and will work
together properly and safely. This
compressor pump is intended ONLY
as a replacement for a similarly rated
pump on an existing compressor that
includes all other needed components.
Constructing a new compressor using
this pump is not covered by the manual.
Owner’s Manual & Safety Instructions
Save This Manual Keep this manual for the safety warnings and precautions, assembly,
operating, inspection, maintenance and cleaning procedures. Write the product’s serial number in the
back of the manual near the assembly diagram (or month and year of purchase if product has no number).
Keep this manual and the receipt in a safe and dry place for future reference.
When unpacking, make sure that the product is intact
and undamaged. If any parts are missing or broken,
please call 1-888-866-5797 as soon as possible.
Copyright©2010 by Harbor Freight Tools®. All rights reserved.
No portion of this manual or any artwork contained herein may be reproduced in
any shape or form without the express written consent of Harbor Freight Tools.
Diagrams within this manual may not be drawn proportionally. Due to continuing
improvements, actual product may differ slightly from the product described herein.
Tools required for assembly and service may not be included.
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.
REV 16b

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SAFETY MAINTENANCE PARTS LISTSETUP
Table of Contents
Safety ......................................................... 2
Specifications ............................................. 5
Instructions for putting into use................... 6
Maintenance.............................................. 11
Parts List and Diagram.............................. 14
Warranty .................................................... 16
WARNING SYMBOLS AND DEFINITIONS
This is the safety alert symbol. It is used to alert you to potential personal injury hazards.
Obey all safety messages that follow this symbol to avoid possible injury or death.
Indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.
Addresses practices not related to personal injury.
IMPORTANT SAFETY INFORMATION
General Safety Warnings
WARNING Read all safety warnings and instructions.
Failure to follow the warnings and instructions may result in electric shock, fire and/or serious injury.
Save all warnings and instructions for future reference.
The warnings, precautions, and instructions discussed in this instruction manual cannot cover all possible
conditions and situations that may occur. It must be understood by the operator that common sense
and caution are factors which cannot be built into this product, but must be supplied by the operator.
1. Work area safety
a. Keep work area clean and well lit.
Cluttered or dark areas invite accidents.
b. Do not operate the Compressor Pump in
explosive atmospheres, such as in the
presence of flammable liquids, gases or dust.
Compressor pump motors produce sparks
which may ignite the dust or fumes.
c. Keep children and bystanders away
from an operating compressor pump.
2. Personal safety
a. Stay alert, watch what you are doing
and use common sense when operating
this compressor pump. Do not use this
compressor pump while you are tired
or under the influence of drugs, alcohol
or medication. A moment of inattention
while operating a compressor pump may
result in serious personal injury.
b. Use personal protective equipment.
Always wear ANSI-approved eye
protection during setup and use.

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SAFETYMAINTENANCEPARTS LIST SETUP
General Safety Warnings (continued)
3. Compressor Pump use and care
a. Disconnect the plug of the compressor
motor from the power source before
installing, making any adjustments, changing
accessories, or storing the Compressor
Pump. Such preventive safety measures
reduce the risk of starting the unit accidentally.
b. Store an idle compressor pump out of the
reach of children and do not allow persons
unfamiliar with the compressor pump or these
instructions to operate it. A compressor pump
is dangerous in the hands of untrained users.
c. Maintain the Compressor Pump. Keep the
Compressor Pump clean for better and
safer performance. Follow instructions
for lubricating and changing accessories.
Keep dry, clean and free from oil and grease.
Check for misalignment or binding of moving
parts, breakage of parts and any other
condition that may affect the compressor’s
operation. If damaged, have the compressor
repaired before use. Many accidents are caused
by a poorly maintained compressor pump.
d. Use the Compressor Pump in accordance
with these instructions, taking into account
the working conditions and the work to be
performed. Use of the Compressor Pump
for operations different from those intended
could result in a hazardous situation.
4. Service
a. Have the Compressor Pump serviced by a
qualified repair person using only identical
replacement parts. This will ensure that the
safety of the Compressor Pump is maintained.
Compressor Pump Safety Warnings
1. ONLY a qualified engineer with appropriate
certifications may attempt designing a new
compressor to ensure that all required safety
and control elements are in place and will work
together properly and safely. This compressor
pump is intended ONLY as a replacement
for a similarly rated pump on an existing
compressor that includes all other needed
components. Constructing a new compressor
using this pump is not covered by this manual.
2. Use Safety Guard for Pulleys. The Air
Compressor Pump Pulley (58), V-belts (not
included), and motor pulley (not included) must
be covered by a safety guard (not included)
covering all moving elements before operation.
3. Before first and every use, verify
Pump has sufficient oil.
4. The use of accessories or attachments not
recommended by the manufacturer may
result in a risk of injury to persons.
5. Misalignment between Motor and Pump
can damage the Pump Pulley. Use a
straight edge, such as a yardstick, to check
and adjust alignment as needed.
6. Use proper size motor and motor pulley.
This Air Compressor Pump must be installed
with a 5 HP electric motor and pulley (both not
included) which can turn the Air Compressor
Pump Pulley at approximately 1050 rpm.
7. Install motor, pulley belts and pulley belt
cover securely. Be sure to use the proper size
bolts to install the motor (not included). The belts
and belt cover (not included) must be strong
enough to prevent breaking and possible injury.
8. Be sure all equipment is rated to the
appropriate capacity of this pump. Make sure
that the lowest rated piece of equipment being
used can handle the maximum pressure of the
Air Compressor Pump (see Specifications).
9. Do not direct the air stream at
any person or animal.
10. Avoid burns. The Cylinders (22), Cylinder
Heads (6) and Air Outlet components become
very hot during operation. Do not touch.
11. Industrial applications must follow OSHA guidelines.
12. Maintain labels and nameplates on the
Compressor Pump. These carry important safety
information. If unreadable or missing, contact
Harbor Freight Tools for a replacement.
13. This product is not a toy.
Keep it out of reach of children.
14. WARNING: The brass components of this product
contain lead, a chemical known to the State
of California to cause cancer and birth defects
or other reproductive harm. (California Health
& Safety Code § 25249.5, et seq.)

Page 4 For technical questions, please call 1-888-866-5797. Item 67698
SAFETY MAINTENANCE PARTS LISTSETUP
Air Compressor Safety Warnings
1. Risk of fire or explosion - do not spray flammable
liquid in a confined area or towards a hot surface.
Spray area must be well-ventilated. Do not
smoke while spraying or spray where spark or
flame is present. Arcing parts - keep compressor
at least 20 feet away from explosive vapors,
such as when spraying with a spray gun.
2. Risk of bursting - do not adjust regulator higher
than marked maximum pressure of attachment.
3. Risk of injury - do not direct air
stream at people or animals.
4. Do not use to supply breathing air.
5. Do not leave compressor unattended
for an extended period while plugged in.
Unplug compressor after working.
6. Keep compressor well-ventilated.
Do not cover compressor during use.
7. Drain tank daily and after use. Internal rust causes
tank failure and explosion.
8. Add correct amount of compressor oil before first
use and every use. Operating with low or no oil
causes permanent damage and voids warranty.
9. Do not remove the valve cover or
adjust internal components.
10. Compressor head gets hot during operation.
Do not touch it or allow children nearby during
or immediately following operation.
11. Do not use the air hose to move the compressor.
12. Release the pressure in the
storage tank before moving.
13. The use of accessories or attachments not
recommended by the manufacturer may
result in a risk of injury to persons.
14. All air line components, including hoses, pipe,
connectors, filters, etc., must be rated for a minimum
working pressure of 150 PSI, or 150% of the
maximum system pressure, whichever is greater.
15. USE OF AN EXTENSION CORD IS NOT
RECOMMENDED. If you choose to use an
extension cord, use the following guidelines:
TABLE A: RECOMMENDED MINIMUM WIRE
GAUGE FOR EXTENSION CORDS
(120 VOLT)
NAMEPLATE
AMPERES
(at full load)
EXTENSION CORD
LENGTH
25′ 50′ 100′ 150′
0 – 6 18 16 16 14
6.1 – 10 18 16 Do not use.
10.1 – 12 16 16 Do not use.
12.1 – 16 14 12 Do not use.
a. Make sure your extension cord
is in good condition.
b. Be sure to use an extension cord which is heavy
enough to carry the current your product will draw.
An undersized cord will cause a drop in line
voltage resulting in loss of power and overheating.
Table A shows the correct size to use depending
on cord length and nameplate ampere rating.
If in doubt, use the next heavier gauge. The
smaller the gauge number, the heavier the cord.
16. Operate unit on level surface. Check oil level
daily and fill to marked level if needed.
17. People with pacemakers should consult their
physician(s) before use. Electromagnetic fields in
close proximity to heart pacemaker could cause
pacemaker interference or pacemaker failure.
SAVE THESE INSTRUCTIONS.

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SAFETYMAINTENANCEPARTS LIST SETUP
Grounding
TO PREVENT ELECTRIC SHOCK AND DEATH
FROM INCORRECT GROUNDING WIRE CONNECTION:
Check with a qualified electrician if you are in doubt as to whether the outlet is properly grounded.
Do not modify the power cord plug provided with any motor used with this Compressor Pump.
Never remove the grounding prong from the plug. Do not use the motor if the power cord or plug is damaged.
If damaged, have it repaired by a service facility before use. If the plug will not fit the outlet, have a proper
outlet installed by a qualified electrician.
Symbology
PSI Pounds per square inch of pressure
CFM Cubic Feet per Minute flow
SCFM Cubic Feet per Minute flow
at standard conditions
NPT National pipe thread, tapered
NPS National pipe thread, straight
Double Insulated
Canadian Standards Association
Underwriters Laboratories, Inc.
VVolts
~Alternating Current
AAmperes
Specifications
Type Single Stage Twin Cylinder; Oil Lubricated
Required HP 5 HP motor
Rated Air Pressure 145 PSI
Speed Range 655 - 1050 RPM
Recommended Speed 850 RPM
Air Outlet 1" –16 UN
Air Delivery
@ 1050 RPM
17.3 SCFM @ 40 PSI
15.2 SCFM @ 90 PSI
Lubrication Splash Type with Oil Level Window
Oil Type SAE 30W non-detergent Air Compressor Oil
(Sold separately)
Pump Pulley 14-1/2" diameter with double V-groove
Belt Type A 1600
Mounting Hole Pattern 5-1/4" x 10-1/4" (center-to-center)
Four 7/16" diameter holes
Recommended
Mounting Bolts 3/8" diameter, grade 5 or better
Overall Dimensions 17-3/4" L x 12-1/4" W x 15" H
Sound Level 89 dB @ 1m

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SAFETY MAINTENANCE PARTS LISTSETUP
Instructions for putting into use
Read the ENTIRE IMPORTANT SAFETY INFORMATION section at the beginning of this
manual including all text under subheadings therein before set up or use of this product.
TO PREVENT SERIOUS INJURY FROM ACCIDENTAL OPERATION:
Turn the power switch “OFF” and unplug the motor from its electrical outlet before
assembling or making any adjustments to the Compressor Pump.
TO PREVENT SERIOUS INJURY AND DEATH FROM IMPROPER INSTALLATION:
ONLY a qualified engineer with appropriate certifications may attempt designing a new compressor
to ensure that all required safety and control elements are in place and will work together properly
and safely. This compressor pump is intended ONLY as a replacement for a similarly rated pump
on an existing compressor that includes all other needed components. Constructing a new compressor
using this pump is not covered by this manual.
Note: For additional information regarding the parts listed in the following pages,
refer to the Assembly Diagram near the end of this manual.
Components
Oil Drain
Plug
Crankcase
Pump Pulley
Oil Fill
Plug
Air Filter Assembly
Oil Sight
Glass
Cylinder Head
Cylinder

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SAFETYMAINTENANCEPARTS LIST SETUP
Assembly
1. Place a small amount of grease in the slot at
the tapered end of the Crankshaft (49) and
insert the Woodruff Key (50) into the slot.
2. Make sure that the center hole and the
keyway on the Pump Pulley (58) are clean
and free of burrs and rough edges.
3. Apply a thin layer of grease to the hole and keyway.
With the indented side of the Pulley center facing
out, align the keyway with the Woodruff Key and
slide the Pump Pulley over the Crankshaft.
WARNING! Do not force or hammer the
Pump Pulley onto the Crankshaft.
4. Slide the Pulley Washer (59) and Spring Washer (60)
onto the Bolt (61) and insert the Bolt through
Pump Pulley and thread counterclockwise into the
Crankshaft. Tighten using a wrench (not included).
Note: The Bolt has a left-hand thread.
To tighten, turn Bolt counterclockwise.
Insert Pump Pulley (58)
with this side facing out.
Woodruff Key (50)
Crankshaft (49)
Spring Washer (60) Bolt (61)
Pulley
Washer
(59)
Keyway
Figure A: Pump Pulley Assembly
Installation
Note: Depending on your level of expertise, you may wish
to have a qualified technician perform this installation.
NOTICE: Avoid damage to the Air Compressor
Pump and other equipment. The Compressor Pump
mounting platform should be flat, level, and strong
enough to support the combined weight of the Pump,
electric motor or engine, and related hardware and
equipment. It must also be capable of withstanding
the vibration and tension of the drive belt.
1. Place the Air Compressor Pump on the mounting
surface at the same level as the 5 HP motor used
to drive it. Pump positioning must incorporate
easy access to the Oil Drain Plug (36).
2. Use a motor with the appropriate size pulley to
achieve the needed Pump RPM. To calculate
the motor and motor pulley needed to power
the pump, multiply the Pump Pulley diameter
(14.5") times the pump working RPM (1050)
which equals 15,225, then divide by the motor
RPM. This will determine the motor pulley
diameter (in inches) needed to run the unit.
For example: To calculate the pulley diameter
needed for a 1725 RPM motor, multiply 14.5
by 1050, then divide by 1725, which equals
a motor pulley size of 8.8 inches. Use
the pulley size closest to this figure.
15,225
1725 = 8.8"
Motor Pulley
Pump Pulley
Pump Pulley Dia.
14.5"
(14.5" Pump Pulley Dia. x 1050 Pump RPM)
Motor RPM
15,225
=
Motor
Pulley
Dia.
Figure B: Calculation for Motor Pulley
3. The Pump Pulley (58) must be in perfect alignment
with the motor pulley (not included). Misalignment
between the Motor and the Pump can cause
damage to both the motor and the compressor
pump. Use a straight edge, such as a yardstick,
to check and adjust alignment as needed.
Note: Ensure the Pump Pulley is installed
for counterclockwise rotation when facing
the pulley side of the Pump.
4. Verify that the Pump Pulley turns freely where
it overhangs the mounting surface.
5. Place two V-groove belts (not included) over
the Pump Pulley and the motor pulley.

Page 8 For technical questions, please call 1-888-866-5797. Item 67698
SAFETY MAINTENANCE PARTS LISTSETUP
Installation (continued)
6. Pull the Compressor Pump until properly aligned,
and the belts are tight. Recheck the motor
pulley, V-belts, and Pump Pulley alignment.
7. Use mounting holes in the Compressor Pump
base as a template to mark the spots where four
holes will be drilled in the mounting surface.
8. Move the Compressor Pump aside and drill four
3/8" diameter holes in the mounting surface.
9. Move the Compressor Pump back to its mounting
position and secure each corner of the base with
a 3/8" diameter grade 5 or better bolt, washer,
lock washer, and nut (all not included).
10. Make final alignment and adjust belt tension with
the motor. It may be necessary to loosen the motor
mounting bolts to adjust the motor location. To test
the proper tension on the V-belts, press down on
the belts — there should be 1/2" deflection or less
at mid span. Tighten all mounting hardware.
11. Connect plumbing hardware (not included) from
the 1"–16 UN Air Outlet to the air destination (i.e.,
air pressure tank of the compressor, not included),
routing the tubing in the shortest possible path.
12. Depending on the tool which you will be using
with this Compressor Pump, you may need to
incorporate additional components, such as an
in-line oiler, a filter, or a dryer (all sold separately),
as shown on Figure D on page 9 and
Figure E on page 10. Consult your air
tool’s manual for needed accessories.
13. Install a safety guard (not included) that surrounds
the motor pulley, V-belts, and Pump Pulley. This
safety guard must cover all sides of the moving
belts and pulleys. It should have a clearance of
about one inch from the moving parts. The safety
guard must be sturdy enough to prevent injury.
WARNING! Avoid serious injuries. Do not
operate this Air Compressor Pump without
a safety guard in place.
14. To operate, fill the Compressor Pump Crankcase
with Air Compressor Oil (sold separately) following
the directions in the next section. Then follow the
manufacturer’s operating instructions and safety
warnings applicable to your air compressor.
Checking the Oil
1. Check the oil level before operation.
Fill the Pump Crankcase with
SAE 30W, non-detergent,
Air Compressor Oil (sold separately).
IMPORTANT: Running the Air Compressor
Pump with no oil or low oil will cause damage
to the equipment and void the warranty.
2. The oil level should be at the center of the FULL level
on the oil level sight glass, as shown in Figure C.
Add oil as needed to maintain this level.
Do not let the oil level go below the center
dot (LOW as shown in Figure C) and do not
overfill the oil so that it is above the center dot
(OVERFILL as shown in Figure C) on the sight glass.
OVERFILL
LOW
FULL
Figure C: Oil Sight Glass
3. To add oil:
a. Remove the Oil Fill Plug.
b. Using a funnel to avoid spills, pour enough
oil into the Pump Crankcase to reach the
FULL level in the Oil Sight Glass.
c. Replace the Oil Fill Plug.
Note: SAE 30W, non-detergent,
Air Compressor Oil (sold separately) is
recommended for use with this compressor.
4. If uncertain which oil to use for this compressor,
call Harbor Freight Tools customer service
at 1-888-866-5797 for assistance.
5. Change the compressor oil after the first
hour of use to remove any debris.
CAUTION! TO PREVENT INJURY FROM BURNS:
Do not add or change the oil while
the compressor is in operation.
Allow the compressor to cool before replacing oil.
Note: This pump will consume oil during
operation, so check oil level before every use.

Page 9For technical questions, please call 1-888-866-5797.Item 67698
SAFETYMAINTENANCEPARTS LIST SETUP
Figure D: Portable Air Supply Setup
G
A
E
E H
F
B
Non-lubricated Tools Lubricated Tools
A
B
C
C
DA
Description Function
A Air Hose Connects air to tool
B Filter Prevents dirt and condensation from damaging tool or workpiece
C Regulator Adjusts air pressure to tool D Lubricator (optional) For air tool lubrication
E Coupler and Plug Provides quick connection and release
F Leader Hose (optional) Increases coupler life
G Air Cleaner / Dryer (optional) Prevents water vapor from damaging workpiece
H Air Adjusting Valve (optional) For fine tuning airflow at tool

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SAFETY MAINTENANCE PARTS LISTSETUP
Figure E: Stationary Air Supply Setup
N
L
L O
M
C C
Non-lubricated
Tools
Lubricated Tools
H
I
I
J
JKH
F
G
E
Slope
F
F
B B
A
A
CD
Description Function
A Vibration Pads For noise and vibration reduction
B Anchor Bolts Secures air compressor in place
C Ball Valve Isolates sections of system for maintenance D Isolation Hose For vibration reduction
EMain Air Line - 3/4″ minimum recommended Distributes air to branch lines
F Ball Valve To drain moisture from system
GBranch Air Line -1/2″ minimum recommended Brings air to point of use
H Air Hose Connects air to tool
I Filter Prevents dirt and condensation from damaging tool or workpiece
J Regulator Adjusts air pressure to tool
K Lubricator (optional) For air tool lubrication
L Coupler and Plug Provides quick connection and release
M Leader Hose (optional) Increases coupler life
N Air Cleaner / Dryer (optional) Prevents water vapor from damaging workpiece
O Air Adjusting Valve (optional) For fine tuning airflow at tool

Page 11For technical questions, please call 1-888-866-5797.Item 67698
SAFETYMAINTENANCEPARTS LIST SETUP
Maintenance and Servicing
Procedures not specifically explained in this manual must
be performed only by a qualified technician.
TO PREVENT SERIOUS INJURY FROM ACCIDENTAL OPERATION:
Turn the power switch “OFF” and unplug the motor from its electrical outlet before
performing any inspection, maintenance, or cleaning procedures.
TO PREVENT SERIOUS INJURY FROM COMPRESSOR FAILURE:
Do not use damaged equipment. If abnormal noise or vibration occurs,
have the problem corrected before further use.
Cleaning, Maintenance, and Lubrication
1. BEFORE EACH USE, inspect the general
condition of the Compressor Pump. Check for:
• low oil level
• loose hardware
• misalignment or binding of moving parts
• worn, cracked, or damaged belts
• cracked or broken parts
• any other condition that may
affect its safe operation.
2. AFTER USE, wipe external surfaces of
the compressor with a clean cloth.
Maintenance Schedule
Following are general guidelines for maintenance checks of the Air Compressor Pump.
Note: The environment in which the Compressor Pump is used, and the frequency of use can affect
how often you will need to check the pump components and perform maintenance procedures.
Daily:
a. Check oil level.
b. Check for oil leaks.
c. Make sure all nuts and bolts are tight.
d. Check for abnormal noise or vibration.
e. Check for air leaks.*
f. Inspect belts.
g. Wipe off any oil or dirt from
the Compressor Pump.**
* To check for air leaks, apply soapy water to joints while
the Air Compressor is pressurized. Look for air bubbles.
** To clean the compressor pump surface, wipe with
a damp cloth, using a mild detergent or mild solvent.
Weekly:
a. Inspect Air Filters.
b. Inspect Oil Breather Plug.
Monthly:
Check belt adjustment.
Every 6 months or 100 Operation Hours:
Replace Pump oil.***
*** Use SAE 30W, non-detergent,
Air Compressor Oil only (sold separately).

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SAFETY MAINTENANCE PARTS LISTSETUP
Oil Maintenance
Check the oil periodically for clarity. Replace oil if it appears milky or if debris is present,
or every 6 months, or 100 hours of runtime, whichever comes first.
In harsh environments such as high heat or high humidity, you will need to replace the oil more frequently.
CAUTION! TO PREVENT INJURY FROM BURNS:
Allow Compressor Pump to cool before changing the oil.
1. Place a container under the Oil Drain Plug.
2. Remove the Oil Fill Plug to allow
air flow into the Pump.
3. Remove the Oil Drain Plug, allowing
the oil to drain into the container.
4. When the oil is completely drained from the Pump,
replace the Oil Drain Plug.
5. Fill the Pump with new SAE 30W,
non-detergent, Air Compressor Oil to the
FULL level on the Oil Sight Glass.
6. Replace and tighten the Oil Fill Plug.
7. Discard the old oil according to local,
state and federal regulations.
Air Filter Maintenance
Check the Air Filters weekly to see if they need replacement.
If working in dirty environments, you may need to replace the filters more often.
1. Remove the Air Filter Front Covers.
2. Remove the Air Filter Elements.
3. Replace with new Air Filter Elements.
4. Replace the Covers.

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SAFETYMAINTENANCEPARTS LIST SETUP
Troubleshooting
Problem Possible Causes Likely Solutions
Compressor builds
pressure too slowly
1. Crankcase oil overfilled or oil too thick.
2. Working environment too cold.
3. Loose fittings.
1. Drain oil and refill to proper level with recommended oil.
2. Move compressor to a warmer location.
Check that recommended oil is in crankcase.
3. Reduce air pressure, then check all fittings with
a soap solution for air leaks and tighten as needed.
Do not overtighten.
Compressor not
building enough
air pressure
1. Air filters need cleaning/replacing.
2. Compressor not large enough for job.
3. Loose fittings.
4. Hose or hose connections too narrow.
5. Crankcase oil too thick.
6. High altitude reducing air output.
1. Check inlet and outlet filters.
Clean and/or replace as needed.
2. Check if accessory CFM is met by Compressor.
If Compressor cannot supply enough air flow (CFM),
you need a larger Compressor.
3. Reduce air pressure, then check all fittings with
a soap solution for air leaks and tighten as needed.
Do not overtighten.
4. Replace with wider hose and/or hose connections.
5. Drain oil and refill to proper level with recommended oil.
6. Higher altitudes require compressors with greater output.
Overheating 1. Air filters need cleaning/replacing.
2. Crankcase oil too thin or incorrect type.
3. Crankcase oil level too low.
4. Unusually dusty environment.
5. Unit not on level surface.
1. Check inlet and outlet filters.
Clean and/or replace as needed.
2. Drain oil and refill to proper level with recommended oil.
3. Add oil to proper level, check for leaks.
4. Clean and/or replace filters more often or
move unit to cleaner environment.
5. Reposition unit on a level surface.
Excessive noise 1. Loose fittings.
2. Loose or damaged belt guard.
3. Crankcase overfilled with oil or oil
is incorrect thickness or type.
4. Crankcase oil level too low.
5. Unit not on level surface.
1. Reduce air pressure, then check all fittings with a soap
solution for air leaks and tighten as needed.
Do not overtighten.
2. Replace belt guard.
3. Drain oil and refill to proper level with recommended oil.
4. Add oil to proper level, check for leaks.
5. Reposition unit on a level surface.
Moisture in
discharge air
Too much moisture in air. Install inline air filter/dryer, and/or relocate
to less humid environment.
Air leaks from
pump or fittings
Loose fittings. Reduce air pressure, then check all fittings with a soap
solution for air leaks and tighten as needed.
Do not overtighten.
Oil in discharge
air or high oil
consumption
1. Crankcase oil too thin or
crankcase overfilled with oil.
2. Unit not on level surface.
3. Crankcase vent clogged.
1. Drain oil and refill to proper level with recommended oil.
2. Reposition unit on a level surface.
3. Clean Crankcase vent.
Follow all safety precautions whenever diagnosing or servicing the compressor.
Disconnect power supply before service.

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SAFETY MAINTENANCE PARTS LISTSETUP
Part Description Qty
1 Air Outlet 1
2 Exhaust 3-way 1
3 Nut 1
3a Clamp Ring 1
4 Bolt 8
5 Spring Washer 8
6 Cylinder Head 2
7Air Filter Assembly 2
8 Air Filter Rear Cover 2
9 Air Filter Element 2
10 Air Filter Front Cover 2
11 Cylinder Head Gasket 2
12 Screw 12
13 Spring Washer 12
14 Outlet Valve Guard 4
15 Valve Plate 2
16 Valve Seat 2
17 Valve Plate 2
18 Cylinder Gasket 2
19 Nut 8
20 Spring Washer 8
21 Stud 8
22 Cylinder 2
23 Cylinder Gasket 2
24 Piston Ring Set 2
25 Compression Ring 2
26 Compression Ring 2
27 Oil Ring 2
28 Piston 2
29 Piston Pin 2
30 Circlip for Piston Pin 4
31 Connecting Rod 2
32 Exhaust Copper Pipe Assembly 1
Part Description Qty
33 Exhaust Nut 2
34 Exhaust Copper Pipe 1
35 Collar 1
36 Oil Drain Plug 1
37 O-Ring 1
38 Oil Sight Glass 1
39 Bolt 4
40 Spring Washer 4
41 Bearing Cover 1
42 Bearing Cover Gasket 1
43 Bearing 1
44 O-Ring 1
45 Oil Fill Plug 1
46 Crankcase 1
47 Circlip for Shaft 1
48 Washer 1
49 Crankshaft 1
50 Woodruff Key 1
51 Bearing 1
52 Oil Seal 1
53 Bearing Seat Gasket 1
54 Bearing Seat 1
55 Breather Assembly 1
55a Breather 1
55b Washer 2
55c Ball 1
55d Breather Rod 1
56 Spring Washer 6
57 Bolt 6
58 Pump Pulley 1
59 Washer 1
60 Spring Washer 1
61 Bolt 1
Parts List and Diagram
PLEASE READ THE FOLLOWING CAREFULLY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST AND ASSEMBLY DIAGRAM
IN THIS MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER OR DISTRIBUTOR
MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER THAT HE OR SHE IS
QUALIFIED TO MAKE ANY REPAIRS TO THE PRODUCT, OR THAT HE OR SHE IS QUALIFIED TO REPLACE
ANY PARTS OF THE PRODUCT. IN FACT, THE MANUFACTURER AND/OR DISTRIBUTOR EXPRESSLY
STATES THAT ALL REPAIRS AND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN BY CERTIFIED AND
LICENSED TECHNICIANS, AND NOT BY THE BUYER. THE BUYER ASSUMES ALL RISK AND LIABILITY
ARISING OUT OF HIS OR HER REPAIRS TO THE ORIGINAL PRODUCT OR REPLACEMENT PARTS
THERETO, OR ARISING OUT OF HIS OR HER INSTALLATION OF REPLACEMENT PARTS THERETO.
Parts List
Record Product’s Serial Number Here:
Note: If product has no serial number, record month and year of purchase instead.
Note: Some parts are listed and shown for illustration purposes only,
and are not available individually as replacement parts.

Page 15For technical questions, please call 1-888-866-5797.Item 67698
SAFETYMAINTENANCEPARTS LIST SETUP
Assembly Diagram

Limited 90 Day Warranty
Harbor Freight Tools Co. makes every effort to assure that its products meet high quality and durability standards,
and warrants to the original purchaser that this product is free from defects in materials and workmanship for the
period of 90 days from the date of purchase. This warranty does not apply to damage due directly or indirectly,
to misuse, abuse, negligence or accidents, repairs or alterations outside our facilities, criminal activity, improper
installation, normal wear and tear, or to lack of maintenance. We shall in no event be liable for death, injuries
to persons or property, or for incidental, contingent, special or consequential damages arising from the use of
our product. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the
above limitation of exclusion may not apply to you. THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS.
To take advantage of this warranty, the product or part must be returned to us with transportation charges
prepaid. Proof of purchase date and an explanation of the complaint must accompany the merchandise.
If our inspection verifies the defect, we will either repair or replace the product at our election or we may
elect to refund the purchase price if we cannot readily and quickly provide you with a replacement. We will
return repaired products at our expense, but if we determine there is no defect, or that the defect resulted
from causes not within the scope of our warranty, then you must bear the cost of returning the product.
This warranty gives you specific legal rights and you may also have other rights which vary from state to state.
3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • 1-888-866-5797